My old NAD C350 AMP diode turns green when the amp is switched on, says one click, but the second click sound does not appear, like in the good old days. What to do?
I have a friend, that might be able to help me, with your guidance on the site....I have a friend, that might be able to help me, with your guidance on the site....
You can't post conmments that contain an email address.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
That could indeed be the issue, but you must check your speakers, wiring, and also the oupt stages for problems. Maybe the prtection circuits are actually doing their job. lol
Your receiver has a condition known as DC Offset, meaning you have a damaged amplifier. That second relay click, that you don't hear now, is the speaker protection relay not closing, due to the damage.
If you're interested in having your receiver repaired, please visit my website at audioserviceclinic.com. You may contact me there. Thank you.
how old is the amp? if over 20 it probably needs new capacitors, if it is newer, and hasn't been abused, you will need to adjust the slew rate and damping, if you don't know what these are, i'd take it to a shop to have it done and tested. if you do and have an oscilloscope the little pots are near the biasing resistors in the output stage. good luck, with a little work these are great amps.
With no background on the original problem and no details regarding what parts were replaced how can anyone answer the question?
What exactly does it mean if 'everything works' but it has 'no sound output'? As a two channel amp that would be its ONLY function.
The root cause for 'no sound' could be something as simple as a misplaced control (Tape Monitor?) or missing pre-out/main in links. It's in the manual.
Replace 3 capacitors on the protect printboard. (located near the outpt terminals) 50V electrolyt: 4,7uF, 47uf and 10uF. And move the big diode to the back of the printboard (the heat from the diode dries out the capacitors)
Have you checked the rectifier diodes / bridge rectifier . Most DMMs have setting where you can test for forward voltage drop on a diode 0.300- 0.800v depending on the type. If it reads nothing , swap the meter leads. Also check the leads coming from the power transformer and see if there's continuity. THey will read low value ohms
check your output stage for bad speakers cable or bare wire of cable touch the body of amp----short circuit speaker cable----bad speaker it self------ bad input cable or defective input device . disconnect all and check if it is ok---start to connect one by one from input to outputs------if all above failed you must contact service center for help.
×